[TechAssist] Re: Sony KP-48S65R Shut Down
- From: "Shoreline Electronics" <jstielau@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 17 Nov 2005 22:12:44 -0500
2SC5148
Manual is available thru Techassist members page.
==========================
Jeff Stielau
Shoreline Electronics Repair
344 East Main Street
Clinton,CT 06413
860-399-1861
860-664-3535 (fax)
jstielau@xxxxxxxx
========================
----- Original Message -----
From: <WWill90634@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, November 17, 2005 10:29 AM
Subject: [TechAssist] Re: Sony KP-48S65R Shut Down
>
> In a message dated 11/16/2005 12:13:52 P.M. Eastern Standard Time,
> jstielau@xxxxxxxx writes:
> Will,
>
> Whenever you find shorted Horizontal Output shorted...ya gotta ask your
> self.....what made this fail?
>
> 99% of the time if you pop a new one in with no resolution on why it
> failed....it will no doubt fail again.
>
> Typically either 3 things occur.....
>
> 1) Too much B+ on the collector
>
> 2) Improper drive on the base
>
> 3) Excessive load from the flyback or horizontal support circuitry.
>
> One your set , more than likely the flyback is at fault.
>
> Do you have the gear to ring it or drive it with the set not plugged in (
> Sencore products)
>
> Make sure you use a quality 2SC5148....not a SK/NTE/ECG replacement
>
> See this tip also......
>
> ---------------------------------------------------------------
> Text pasted from WinSTIPS 2.0
> http://www.ServiceSoftware.com
> ---------------------------------------------------------------
>
> SONY KP53S65
>
> Dead
>
> Mcgregor TV Service
>
> Q502 Horizontal Output Short 2sc5148
> C514 Burnt 100pf To 680 Pf 2/Kv According To Hv
>
> ---------------------------------------------------------------
>
>
>
> =================================
> Jeff Stielau
> Shoreline Electronics Repair
> 344 East Main Street
> Clinton,CT 06413
> (860)399-1861
> (860)664-3535 FAX
> jstielau@xxxxxxxx
> =================================
> ----- Original Message -----
> From: <WWill90634@xxxxxxx>
> To: <Techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, November 16, 2005 10:52 AM
> Subject: [TechAssist] Sony KP-48S65R Shut Down
>
>
>> We have this Sony KP-48S65 in for service. The set was dead, we found
>> the
>> Horizontal output transistor shorted and replaced it. The unit fired up
>> with a
>> tick sound and shorted the HOT again.We checked the blue cap on the
>> collector
>> and it is ok.
>>
>> Any suggestion or tips will be appreciated.
>> TIA
>>
>> Will
>> Soundview Electronics
>>
>>
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>
>
> We don't have service info on this set. The Horizontal output transistor
> that was in the set was a 2SD-2348 which we are assuming its the
> original,2SD-2348 is what we replaced it with. You mentioned a 2SC-2148.
> Which is the
> original?
>
> SOUNDVIEW ELECTRONICS
> Four Oaks, N.C. 27524
> 919-963-3160
>
>
>
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